topic Re: serverobject becomes null in SOI in ArcGIS Enterprise Extensibility Questions

serverobject becomes null in SOI

AndreasRuloffs2 — Wed, 09 Jun 2021 08:48:15 GMT

Hi,

I have written an SOI for rights management in c# and let it run on ArcGIS server 10.7.1.

Normally it is working good, but sometimes the Service becomes unavailable. In the Log files I find the message:

<Msg time="2021-05-31T10:13:27,277" type="SEVERE" code="9000" source="Rest" process="4724" thread="1" methodName="" machine="MU-KARTENSRV.REGIONHANNOVER.DE" user="" elapsed="" requestID="feed7716-61c9-4107-ad25-5133bfcc1d58">Error performing query operation Error handling service request :0x80004003 - Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt. in 'GlobalNetXXSOI'</Msg>

The error message says, that there is a null pointer.

The translation of the germen massage should be:

"Object reference not set to an instance of an object"

I have a class attribute:

private IServerObject serverObject;

Like in the esri samples it is filled in the init method:

public void Init(IServerObjectHelper pSOH) { try { serverObject = pSOH.ServerObject; } catch (Exception e) { logger.LogError(e); Logger.WriteSystemError(e.ToString()); } }

But now it seems, that this attribute becomes null some times. Is there any way I could get the ServerObject, outside the Init method, so I could restore it, when it becomes null?

Best regards,

Andreas Ruloffs

Re: serverobject becomes null in SOI

nicogis — Wed, 09 Jun 2021 13:24:13 GMT

get IServerObjectHelper in init

The server object helper implements a weak reference on a server object such that a server object extension can keep a string reference on the server object helper (for example, in a member variable) and avoid keeping a strong reference on the server object itself.

Re: serverobject becomes null in SOI

AndreasRuloffs2 — Fri, 11 Jun 2021 08:44:13 GMT

Thank you for your answer,

OK, so I will change it, that I keep the helper in a member and access the serverObject from it.

But I am afraid, this wont fix my problem, cause I had the problem when I had solved it this way some time ago.